Discovery HD

How do they engineer the latest incarnation of the classic Royal Enfield Continental GT motorbike? Plus, how do 'art detectives' spot a forgery.

How do they blend science and destruction at crash test centres? And how do they piece together the complex mechanism of a pocket sized umbrella.

Andy finds a wire harness to marry his SVO Mustang to a new EcoBoost engine. George cuts an F350 in half to create a single cab short bed diesel pick-up truck.

Andy returns a 2010 Dodge Viper to muscle car glory. Then, he fixes up a 1950 fire truck - but money's tight so he gets creative to put Big Red back on the road.

Parker makes a purchase that shocks the entire team. Tony clamps down on his son Mike's operation. Kevin starts his first full week of sluicing.

Vegas, Baby! Rick gambles all his profits on a risky cut. Parker's team leans on the new Sulphur Creek claim. Monica offers a solution to Tony's problems.

Heavy D finally finishes the 'Fail of the Year' UTV. And gridiron comes to the garage when NFL legend Marshawn Lynch asks the guys to build him a Beastmode UTV.

The Dieselsellerz SEMA build hits a snag, and the guys rush to find a replacement. They decide to rebuild and give away their most iconic build - The Megaram.

A new deckhand falls ill on the Time Bandit, raising questions for Andy. Captain Rick deals with a severe crew injury and Wild Bill's plan A fails.

Sig returns from his mother's funeral only to find his gear in harm's way. The Coast Guard gets a call to extract a sailor with broken legs 200 miles out to sea.

It's been tipping over for 800 years - what's the gravity-defying magic behind Pisa's leaning tower? And, how are chocolate digestive biscuits manufactured.

How did the ancient Greeks invent parchment with techniques still used today? And how do they make shuttlecocks, the fasting moving object in sport.

How do they make smooth writing ballpoint pens that don't leak or fade? And, how do they make pizza for soldiers on the frontline.

In Cremona, how do they make modern violins that sound as good as the legendary Stradivarius? And, how do they build houses with volcanic rock.

A widowed homesteader, realising she didn't learn the skills she needed before her husband's passing, is overwhelmed by her large family homestead.

Mike finds the perfect starter classic, a 1989 Audi Coupe. This rare car has a low mileage, but it's failed its MOT. The guys fix it up before a test drive in Cornwall.

A fierce storm could cause the scrapyard to close for the day. Terry takes a gamble on two rusty loading ramps, and Emma has a plan to make some quick cash.

Rob Nelson investigates rumours of secret underground escape route used by infamous gangster Al Capone. Plus, mysterious earthen mounds in Washington State.

Josh hunts for the truth about the Third Reich's Amerikabomber, a top-secret warplane designed to obliterate New York City.

Winter erupts as Johnathan hunts for crab in a secret location to which he's won exclusive rights. Plus, Sig tries his luck at a derby fishery.